Convert from cental to avogram

Unit Definition (cental)
The cental is an alternate name in Britain for the U.S. hundredweight, which is equal to exactly 100 pounds (the British hundredweight is 112 pounds). Introduced by British merchants around 1850, the name was apparently coined after the model of the quintal. The cental has sometimes been confused with the centner.

Unit Definition (avogram)
The avogram is a unit of mass, equal to 1 gram divided by the Avogadro number.